Fume dispersing device and the like



2 Sheets-Sheet l 5 WJ m @www .ww E E WN. JA .w f s .u m E E. NEWTON FUMEDISPERSING DEVICE AND THE LIKE Filed June l, 1951 E. N EWTON FUMEDISPERSING DEVICE AND TI-1E LIKE May 18, 1954 2 Sheets-Sheet 2 FiledJune l, 1951 XW v e 66E/v rs Patented May 18, 1954 FUME DISPERSINGDEVICE AND THE LIKE Edmund Newton, Thornaby-on-Tees, England, assignorto Furness Shipbuilding Company England, a company of Limited,Billingham, Great Britain and No rthern Ireland Application June 1,1951, Serial No. 229,305

Claims priority, application Great Britain June 6, 195 0 Claims. 1

to fume dispersing deobject being to provide This invention relatesvices andthe like, the improvements therein. t

According to this invention, a fume dispersing device or the like isprovided with a totally enclosed chamber, one or more of theclosuremembers of said chamber providing a mechanical closure thereto but notan air-tight closure whereby air or other gas supplied to said chambercan escape therefrom `when under pressure, said chamber being alsoprovided with connecting means for supplying thereto air or other gasunder compression.

The accompanying drawings illustrate, by way of example, oneconstruction of fume dispersing device in accordance with our invention.In the drawings Figure 1 is a plan view,

Figure 2 is a central vertical section, and

Figures 3 and 4 are plan sections on the lines III-III and IV-IVrespectively in Fig.` 2.

Referring to the drawings,4 in the example therein illustrated, an outerchamber is provided by a cylindrical tubular member a having its endsclosed by plates b, c which make a substantially complete mechanicalclosure thereof. Lugs d are secured by welding or otherwise suitably tothe top plate b and provide means for securing it to the tubular membera by means of studs or bolts e passed through the lugs and the member.`The bottom plate c is welded to the lower end of the member a. The wallof the tubular member is perforated with numerous holes of comparativelysmall area. If `desired the top plate b may be similarly perforated.

A medial chamber is provided comprising a cylindrical tubular member fprovided at its ends with disc closure members g, h of `substantiallylarger diameter than the outer diameterof the tube f so that, whenapplied thereto, they provide external flanges around the tube ends.Angularly spaced screw bolts 7' are secured by welding their shanks tothe exterior of the tube f at each end, said shanks being parallel tothe axis of the tube and their screwthreaded portions projecting fromitsends. The bolts are passed through holes in the discs y, h wherebythey may be secured in facial contact with the tube ends by means ofnuts and lock nuts lc. The discs g, It provide mechanical closures tothe chamber formed inside the tubular member f but, asthe contactingsurfaces are not machined, they do not provide air-tight closures.

An annular plate m is disposed externally around the tubular membermedially of the ends of said member, and its inner edge is welded tosaid member so that it forms a diaphragm around its waist.

The construction forming the medial. chamber and comprising the tubular`member f, the disc enclosures g, 7i and the diahpragm m, is disposed`within the outer chamber a and is secured therein medially of the endsof said chamber and coaxially therewith by means of lugs n welded to theunderside of the diaphragm and attached by screw studs o passing throughholes in said lugs and in the cylindrical wall of the outer chamber. Themedial chamber construction is secured within the outer chamber a toform annular portions of said chamber between the walls a and f, andwith the end closure discs g, h axially spaced from the end plates b, cof the outer chamber. The discs g, h may be of the same diameter as theinternal diameter of the tubular member a, in which case theirprojecting portions may be perforated to allow circulation of gas or airbetween the annular portions of the outer chamber and the end portionsof said chamber. As shown however the discs g, h are of slightly lessdiameter than the internal diameter or the tube a so that a narrowannular space is left between their edges and said tube `for thecircullation of gas or air.

An inner chamber p is provided formed by a channel member of arcuatesection which is secured within and longitudinally of the `tubularmember f by welding its longitudinal edges to the inner surface of saidtube. The transverse depth of the channel member p is substantially lessthan the radius of the tube f so that said inner chamber is locatedadjacent to the wall of theY tube and on one side of the axis. The endsof the channel member p are spaced from the discs g, it of the medialchamber so that there :may be free circulation of gas or air between theinner chamber p and the medial chamber f. Radially aligned holes areprovided in the walls of the tubular members f and u, one hole in eachmember, the hole in the tube f being in that portion thereof which formspart of the wall of the inner chamber p. Conveniently the axis of theholes is in the medial plane of the diaphragm plate m, and a tubularsocket or ferrule r is disposed within the annular portion of the outerchamber u with one end in facial contact with the inner surface of thetube f, said ferrule being welded to the edges of a radial slotprovidedin the diaphragm m.

The ferrule r is screw-threaded internally and an externallyscrew-threaded nipple s is passed Vto persons-occupying the space.

In use, our fume dispersing device is: placed" in a room or otherenclosed or conned space containing fumes, gases, smokeor other'form ofpolluted atmosphere, and"'is"c`onnected` by the nipple s and connectiont'to a source of' compressed air,'whch airis taken from the atmosphereand compressed by meclfiar-iical meansfnot shown, or other suitable gasunder pressure` The compressed airV is led thereby directly into theinner chamber p, whence it passes through both ends thereof into Vthemedial chamber f. SomerV of the pressure air escapes' from the medialchamber`thr`ough theajointsfbetween its-wall and the endl closurediscsig, TL-,zand as-the pressure in the chamber increases, the discs areforced` slightly on? the ends of the'.- tubulanmember' f to allow moreor; the pressure air` to escape from the medialchamberintofthe outerchamber a, as-indi cated'by the arrows in-'Fig.2. It will-be observedthatthe endl discsfggr,,h'v areY in nov way` connected to the perforatedwall of the'outer chamber c., andthatthe resistance-of the discs to thebulging effect'of-- the pressure airfin-the chamber fv depends only on-thernumberof Abel-ts and Vnuts k.

. The' nuts are tightenedeuponthe bolts so-as to press thediseshard-against-therends `ofthe chamberf thereby,l allow-ing:l the.discs to yield .only under considerablerpressure. The pressure air isfurther diffused by-itspaSSagethrOUgh the perforations in-the-wall--ofthe-outerchamber a into the surroundingpolluted atmosphere; -the fumesor' the like being driven-bysaid Vair out of the' roomor other space.- i

When in use, our device is almost noiseless,A

its construction-being4 suchY astof eliminate the loudY noise which isnormally caused by the escape-ofv a considerable volume of pressure lairfrom an open-ended-pipe-such-as-r. It willbe appreciated-thatthis' is animportant advantage as it is not possible for men to workfforr longperiods-when-subjectedfto a continuous highpitched noise.-Moreoven-thefperforated tubular member a'also affords. adequate physicalprotectiontol the medial -chamberf and its end discs g; hwhich-wouldY`otherwise be liable to distorV tion, ifroughlyhandled.-

VThe-primary purpose ofthedevice of the present inventionf-is-to supplyfresh air to.l a confined space laden-withV fumes or the likedetrimental When in operation-the device acts toexpel, viathe normalentry orexit, to or from the space,l any bad air, Vfumes or the like. Toeffectively expel such bad air, `it is necessary to supply the spacewith -airunder pressure. However', as workmen will, in all.probability-beworking` in the-space, thesupply of freshA compressed;airVdirected from a pipe or nozZle,-would-b`e asourceof danger anddiscomfort for the workmen. Therefore, it is necessary to ,diffuse orbreak up'the air supplied under pressure. The small diameter hose, bywhich the compressed air is supplied.V to the device, can be easilypassed through a small size vorice leadingto-the space; for example,through a' man-hole, without obstructing' the outward 4 flow or bad airfrom the space. The apparatus of the present invention has no effect onthe compressed air other than to diffuse it and actually is not requiredto., have any-other:` eiect.

Our fume dispersingdevice is very 'suitable for use in the compartmentsand conned spaces of ships and other vessels under construction orrepair where smoke and fumes are liable to accumulate. `It is?` alsovery suitable for use in conned spaces in Avessels when on service, and'inany other confined or enclosed space where circumstances" require the'dispersal of smoke, fumes or-the like.. Being of small size and light yweight, the devicecan be handled easily and can bel passed through asmall access'man-hole or otherV opening.- Two or more devices may beusedt'simultaneouslyrin one polluted space, according to the size ofsaid-space. There are no mechanical parts to receive attention, and thedevice is readily adaptable for a connection to any standard pneumaticsystem.v Y

What I1 claimandy desire" to -secure"byv Letters Patent is:

l. A-fume dispersin'gidevice or the li.le,-'com prising ahrstfchamberhaving-one orgmoreclo'- sure members Y which: provide aV mechanicalclosure. thereto butnoti an f air-tight vvclosure whereby air orvother-'gasvsupplied to said: chamben can escapel therefrom whenunderpressure, said' chamber havingl a. cylindrical tubular member provided-at each endfwithadisc closure'rnember which is'foff substantiallylarger diameterthan the cuter diameter of said tubular member, -saiddisc closure Vmembers being-.securedfin-facialcontact with'A the ends:of` thetubular: memben by: angularlyf spacedf sci-ewv bolts. and; nuts,means supporting said first chamber to retain-said-cloe sure membersfree of external-contact andfmeans being provided forf supplyingj tother chamber air under compression.Y Y

2. A fume dispersing device or; thev like. as claimed-inclaim l,comprising: an-outer'chamber withinwhichsaid rstchamber.is---whollydisposed, means7 supporting rst said chamber within saidouterl chamber withE the wallsv of said( first-chamberA inspaced-'relationvtdthewalls of said outerchamber.- saidouter.- chamberhaving at least `one wall` perforated@ to allow passage fof` airthereircrn-A to atmosphere.-

3.I A'. fumey dispersingv device orl the like as claimed in claim 2;-wherei-n a channelj member is-w-holly disposedwithin -said first'-chambery and is in lfreecemmunicationtherewith and` with the Y vides adiaphragm: withinr said.; Kou-terr chamber` and secured to -saidouterchamben.

5. A- fume dispe-rsing` device or thel like asset forth inclaim 3*wherein said` channel member` is of' arcuate-section` andy disposedwithin andv 'longitudinalof. said I rstchamberandl securedr byitsfree-edges-to a--vvall` ofi said firstLcham-ber.

Referencesi Citedl in theY le v of f this patent FOREIGN PAIIQI'ISTNumb-er country' Y pate A 344,264' Great-'Britain ni/rar. 5j; 19eressere France sepa' 22', wir

